scroll-text-layer.c

#include <pebble.h>
#include "scroll-text-layer.h"

#define MAX_HEIGHT 2000
#define PADDING_X 4
#define PADDING_Y 4

struct ScrollTextLayer {
  TextLayer* text_layer;
  ScrollLayer* scroll_layer;
};

ScrollTextLayer* scroll_text_layer_create(GRect rect) {
  ScrollTextLayer* stl = malloc(sizeof(ScrollTextLayer));
  stl->scroll_layer = scroll_layer_create(rect);
  GRect max_text_bounds = GRect(PADDING_X, PADDING_Y, rect.size.w - (PADDING_X * 2), MAX_HEIGHT);
  stl->text_layer = text_layer_create(max_text_bounds);
  scroll_layer_add_child(stl->scroll_layer, text_layer_get_layer(stl->text_layer));
  return stl;
}

void scroll_text_layer_destroy(ScrollTextLayer* layer) {
  text_layer_destroy(scroll_text_layer_get_text_layer(layer));
  scroll_layer_destroy(scroll_text_layer_get_scroll_layer(layer));
  free(layer);
}

void scroll_text_layer_add_to_window(ScrollTextLayer* layer, Window* window) {
  scroll_layer_set_click_config_onto_window(layer->scroll_layer, window);
  layer_add_child(window_get_root_layer(window), scroll_layer_get_layer(layer->scroll_layer));
}

void scroll_text_layer_set_text(ScrollTextLayer* layer, char* text) {
  text_layer_set_text(layer->text_layer, text);
  GSize max_size = text_layer_get_content_size(layer->text_layer);
  text_layer_set_size(layer->text_layer, max_size);
  GRect bounds = layer_get_bounds(scroll_layer_get_layer(layer->scroll_layer));
  scroll_layer_set_content_size(layer->scroll_layer, GSize(bounds.size.w, max_size.h + (PADDING_Y * 3)));
}

TextLayer* scroll_text_layer_get_text_layer(ScrollTextLayer* layer) {
  return layer->text_layer;
}

ScrollLayer* scroll_text_layer_get_scroll_layer(ScrollTextLayer* layer) {
  return layer->scroll_layer;
}

scroll-text-layer.h

#include <pebble.h>

struct ScrollTextLayer;
typedef struct ScrollTextLayer ScrollTextLayer;

ScrollTextLayer* scroll_text_layer_create(GRect rect);
void scroll_text_layer_destroy(ScrollTextLayer* layer);
TextLayer* scroll_text_layer_get_text_layer(ScrollTextLayer* layer);
ScrollLayer* scroll_text_layer_get_scroll_layer(ScrollTextLayer* layer);
void scroll_text_layer_add_to_window(ScrollTextLayer* layer, Window* window);
void scroll_text_layer_set_text(ScrollTextLayer* layer, char* text);

#define scroll_text_layer_set_text_color(layer, color) text_layer_set_text_color(scroll_text_layer_get_text_layer(layer), color)
#define scroll_text_layer_set_background_color(layer, color) text_layer_set_background_color(scroll_text_layer_get_text_layer(layer), color)
#define scroll_text_layer_set_font(layer, font) text_layer_set_font(scroll_text_layer_get_text_layer(layer), font)
#define scroll_text_layer_set_text_alignment(layer, alignment) text_layer_set_text_alignment(scroll_text_layer_get_text_layer(layer), alignment)
#define scroll_text_layer_get_layer(layer) text_layer_get_layer(scroll_text_layer_get_text_layer(layer))
#define scroll_text_layer_set_system_font(layer, font) scroll_text_layer_get_text_layer(layer, fonts_get_system_font(font))